X9279 Xicor, X9279 Datasheet
X9279
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X9279 Summary of contents
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... Interface REV 1.1.7 2/6/03 YSTEM X9279 TM DESCRIPTION The X9279 integrates a single digitally controlled potentiometer integrated circuit. The digital controlled potentiometer is implemented using 255 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the 2-Wire bus interface ...
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... X9279 DETAILED FUNCTIONAL DIAGRAM V CC SCL INTERFACE SDA AND CONTROL A2 CIRCUITRY CIRCUIT LEVEL APPLICATIONS • Vary the gain of a voltage amplifier • Provide programmable dc reference voltages for comparators and detectors • Control the volume in audio circuits • Trim out the offset voltage error in a voltage amplifier circuit • ...
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... REV 1.1.7 2/6/03 TSSOP X9279 Connect Device Address for 2-Wire bus. No Connect Device Address for 2-Wire bus. Serial Clock for 2-Wire bus. ...
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... The Address inputs are used to set the least significant 3 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the Address input in order to initiate communication with the X9279. A maximum of 8 devices may occupy the 2- Wire serial bus. REV 1.1.7 2/6/03 Potentiometer Pins ...
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... Serial Interface Description. – Instruction and Register Description. Array Description The X9279 is comprised of a resistor array (see Figure 1). The array contains, in effect, 255 discrete resistive segments that are connected in series. The physical ends of each array are equivalent to the fixed terminals ...
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... HIGH are reserved for indicating start and stop conditions. See Figure 2. Start Condition All commands to the X9279 are preceded by the start condition, which is a HIGH to LOW transition of SDA while SCL is HIGH. The X9279 continuously monitors the SDA and SCL lines for the start condition and will not respond to any command until this condition is met ...
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... I [2:0]. The RB and RA bits point to one of the four Data Registers the POT selection; since the X9279 is single POT, the P0=0. The format is shown in Table 2. Register Bank Selection (RB, RA, P1, P0) There are 16 registers organized into four banks. Bank 0 is the default bank of registers ...
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... X9279 Register Selection (R0 to R3) Table Register RB RA Selection Operations Data Register Read and Write; Wiper Counter Register Operations Data Register Read and Write; Wiper Counter Register Operations Data Register Read and Write; Wiper Counter Register Operations Data Register Read and Write; ...
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... Finally loaded with the contents of its Data Register zero (DR0) upon power-up. The Wiper Counter Register is a volatile register; that is, its contents are lost when the X9279 is powered- down. Although the register is automatically loaded with the value in DR0 upon power-up, this may be REV 1 ...
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... NV Two instructions require a two-byte sequence to complete. These instructions transfer data between the host and the X9279; either between the host and one of the data registers or directly between the host and the Wiper Counter Register. These instructions are: – XFR Data Register to Wiper Counter Register – ...
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... X9279 Figure 4. Three-Byte Instruction Sequence SCL SDA S ID3 ID2 ID1 ID0 External R Device ID Address T Figure 5. Increment/Decrement Instruction Squence SCL SDA 0 0 ID3 ID2 ID1 ID0 Device Figure 6. Increment/Decrement Timing Limits INC/DEC ...
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... Wiper Position Wiper Position S (Sent by X9279 on SDA ...
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... X9279 Transfer Data Register (DR) to Wiper Counter Register (WCR) S Device Type Device T Identifier Addresses Increment/Decrement Wiper Counter Register (WCR) S Device Type Device T Identifier Addresses Notes: (1) “MACK”/”SACK”: stands for the acknowledge sent by the master/slave. ...
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... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Device Max. X9279 +70°C X9279-2.7 +85°C Limits Min. Typ. Max. 100 50 ±20 ...
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... X9279 D.C. OPERATING CHARACTERISTICS Symbol Parameter I V supply current CC1 CC (active supply current CC2 CC (nonvolatile write current (standby Input leakage current LI I Output leakage current LO V Input HIGH voltage IH V Input LOW voltage IL V Output LOW voltage OL V Output HIGH voltage ...
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... X9279 EQUIVALENT A.C. LOAD CIRCUIT 5V 1533Ω SDA pin 100pF AC TIMING Symbol f Clock Frequency SCL t Clock Cycle Time CYC t Clock High Time HIGH t Clock Low Time LOW t Start Setup Time SU:STA t Start Hold Time HD:STA t Stop Setup Time SU:STO t SDA Data Input Setup Time ...
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... X9279 XDCP TIMING Symbol t Wiper response time after the third (last) power supply is stable WRPO t Wiper response time after instruction issued (all load instructions) WRL SYMBOL TABLE . REV 1.1.7 2/6/03 Parameter WAVEFORM INPUTS OUTPUTS Must be Will be steady steady May change Will change from Low to ...
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... X9279 TIMING DIAGRAMS Start and Stop Timing (START) SCL t SU:STA SDA Input Timing t CYC SCL SDA Output Timing SCL SDA REV 1.1.7 2/6/ HD:STA SU:DAT t AA www.xicor.com (STOP) t SU:STO HIGH t LOW t t HD:DAT BUF t DH Characteristics subject to change without notice. ...
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... X9279 XDCP Timing (for All Load Instructions) SCL SDA VWx Write Protect and Device Address Pins Timing SCL SDA WP A0, A1 REV 1.1.7 2/6/03 LSB t WRL (START) (STOP) ... (Any Instruction) ... ... t t SU:WPA HD:WPA www.xicor.com (STOP Characteristics subject to change without notice. ...
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... X9279 APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers V R Three terminal Potentiometer; Variable voltage divider Application Circuits Noninverting Amplifier – (1 Offset Voltage Adjustment 100KΩ – + TL072 10KΩ 10KΩ 10KΩ +12V -12V REV 1 ...
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... X9279 Application Circuits (continued) Attenuator – -1/2 ≤ G ≤ +1/2 Inverting Amplifier – Function Generator – + frequency ∝ amplitude ∝ REV 1.1.7 2/6/ 10kΩ ...
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... X9279 PACKAGING INFORMATION 14-LEAD PLASTIC, TSSOP, PACKAGE TYPE V 0∞ – 8∞ See Detail “A” NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.1.7 2/6/03 .025 (.65) BSC .169 (4.3) .252 (6.4) BSC .177 (4.5) .193 (4.9) .200 (5.1) .047 (1.20) .0075 (.19) .002 (.05) .01 18 (.30) .006 (.15) .010 (.25) Gage Plane Seating Plane ...
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... X9279 16-Bump Chip Scale Package (CSP B16) Package Outline Drawing j m Top View (Marking Side) Package Dimensions Symbol Package Width a Package Length b Package Height c Body Thickness d Ball Height e Ball Diameter f Ball Pitch – Width j Ball Pitch – Length k Ball to Edge Spacing – Width l Ball to Edge Spacing – ...
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... X9279 ORDERING INFORMATION X9279 Device LIMITED WARRANTY Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. ...